CN218963650U - Single-hole feeding type hot extrusion die - Google Patents
Single-hole feeding type hot extrusion die Download PDFInfo
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- CN218963650U CN218963650U CN202220634375.3U CN202220634375U CN218963650U CN 218963650 U CN218963650 U CN 218963650U CN 202220634375 U CN202220634375 U CN 202220634375U CN 218963650 U CN218963650 U CN 218963650U
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Abstract
The utility model provides a single-hole feeding type hot extrusion die, which is characterized in that: comprises an upper die and a lower die; the upper die is provided with a feed inlet and a welding cavity I; the lower die is provided with a welding cavity II and a section bar forming port; the welding cavity I and the welding cavity II form a welding chamber together; the feed inlet is communicated with the welding cavity I; the welding cavity II is communicated with the section bar forming port; the feed inlet is crescent; the middle part of the feeding hole is positioned at one side of the section B-B of the upper die, and both ends of the feeding hole are positioned at the other side of the section B-B of the upper die; the upper die section B-B is an upper die section where a hot extrusion processing center line is located; the positions of the feeding port and the section bar forming port are staggered. The die can solve the problem that a plurality of feed inlets lead to welding line defects of the profile, and improves the process quality of the profile.
Description
Technical Field
The utility model relates to the technical field of dies, in particular to a single-hole feeding type hot extrusion die.
Background
In aluminum alloy extrusion processing, aluminum bars are usually placed in the internal cavity of a feed liner, and the extruder extrudes the aluminum bars into a die by pushing an extrusion gasket to extrude solid aluminum profiles. The feeding port and the discharging port of the traditional solid aluminum profile die are arranged on a hot extrusion processing center line; the central blank is not extruded or is extruded little, a large pressure difference is generated between the extrusion discharging center position and the discharging two sides, and the extruded solid aluminum profile can have the phenomena of very compact peripheral molecular spacing and loose molecular structure at the center part; the produced section is easy to sandwich at the front section and shrink at the tail section.
In order to solve the technical problem of profile sandwich tail shrinkage, a plurality of feed inlets which are staggered with the profile forming openings are formed in an upper die of the novel die at present, blanks are divided into a plurality of feed inlets for feeding, then are converged in a welding chamber, and then are formed and output from the profile forming openings. However, in the mold, because of the gaps among the feeding holes, the produced section bar has the defect of welding lines, and the quality of the section bar is affected.
Disclosure of Invention
The utility model aims to overcome the defects and the shortcomings in the prior art and provide a single-hole feeding type hot extrusion die which can solve the problems that a plurality of feeding ports cause welding line defects of a section bar and improve the process quality of the section bar.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: a single hole pan feeding formula hot extrusion mould, its characterized in that: comprises an upper die and a lower die; the upper die is provided with a feed inlet and a welding cavity I; the lower die is provided with a welding cavity II and a section bar forming port; the welding cavity I and the welding cavity II form a welding chamber together; the feed inlet is communicated with the welding cavity I; the welding cavity II is communicated with the section bar forming port; the feed inlet is crescent; the middle part of the feeding hole is positioned at one side of the section B-B of the upper die, and both ends of the feeding hole are positioned at the other side of the section B-B of the upper die; the upper die section B-B is an upper die section where a hot extrusion processing center line is located; the positions of the feeding port and the section bar forming port are staggered.
The hot extrusion die is only provided with a single feeding port, so that the problem that welding lines appear on the profile due to a plurality of feeding ports can be solved, and the process quality of the profile is improved; the positions of the feeding hole and the profile forming hole are staggered, and the feeding hole is crescent, so that blanks formed by processing bars can quickly and uniformly reach the front of the profile forming hole, and the profiles are output under the uniform extrusion effect, so that the quality of the profiles is further improved.
Preferably, a top wall of the welding cavity is provided with a flow blocking head protruding downwards; the section forming opening is completely positioned in a shadow area of the choke head projected to the lower die so as to realize that the positions of the feeding opening and the section forming opening are staggered. In the utility model, the flow of the blank is blocked, the blank is fully extruded, and the processed section bar has no sandwich and no tail shrinkage.
Preferably, the center of the bottom surface of the choke head and the middle part of the feed inlet are both positioned on the same side of the upper die section B-B. The blank is easy to reach the area of the choke head away from the feed opening.
Preferably, the choke head is provided with a reinforcing rib at one side far away from the feed inlet; the reinforcing rib is respectively fixed with a top wall of the welding cavity and a side wall of the welding cavity; and a first interval is reserved between the bottom of the reinforcing rib and the bottom of the choke head.
Preferably, a second space is reserved between the bottom of the choke head and the bottom of the upper die. The blank enters from the crescent feed inlet, reaches a welding area with a round cross section after passing through the periphery of the choke head, and is uniformly distributed before reaching the profile forming opening.
Preferably, the feeding hole gradually inclines back to the hot extrusion center line from the surface far away from the welding cavity to the surface close to the second welding cavity to form an inclined surface. The design can enlarge the feeding area of the feeding port on one hand, and can play a role in blocking on the other hand, so that the blank is extruded better.
Preferably, the upper die is of a symmetrical structure with the upper die section A-A as a symmetrical plane; the upper die section A-A and the upper die section B-B are vertically intersected, and the vertical intersection is a hot extrusion processing center line;
the outer arc line at the top of the feed inlet is arranged on a circumference which takes one point on the hot extrusion processing center line as the center of a circle; the inner side arc of the bottom of the feeding hole is arranged on a circumference two which takes a point on a hot extrusion processing center line as a circle center in the area of one side of the upper die section B-B, which is close to the center of the feeding hole.
Preferably, the ratio of the diameter of the circumference one to the diameter of the processed bar is: (0.85-0.95): 1.
preferably, the ratio of the area of the feed inlet to the cross-sectional area of the processed bar is: 1: (2-4).
Preferably, the ratio of the cross-sectional area of the profile molding opening to the largest cross-sectional area of the welding chamber is: 1: (7-30).
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the hot extrusion die is only provided with a single feeding port, so that the problem that welding lines appear on the profile due to a plurality of feeding ports can be solved, and the process quality of the profile is improved; the feeding hole is crescent, and the feeding hole is staggered with the section bar forming hole, so that blanks formed by processing the bar materials can quickly and uniformly reach the section bar forming hole, the section bar is output under the uniform extrusion effect, and the quality of the section bar is improved;
2. the upper die is provided with the choke heads, so that the flow of the blank is blocked, the blank is fully extruded, and the processed section bar has no sandwich and no tail shrinkage;
3. the die can realize uniform distribution of blanks before reaching a section forming port, and further improve the section quality.
Drawings
FIG. 1 is a schematic cross-sectional view of a hot extrusion die according to an embodiment;
FIG. 2 is a schematic diagram of an upper die structure of a hot extrusion die according to an embodiment;
FIG. 3 is a schematic diagram showing the internal structure and the cross section of a hot extrusion die according to an embodiment;
FIG. 4 is a schematic cross-sectional view of a second embodiment of a hot extrusion die;
FIG. 5 is a schematic diagram of an upper die structure of a hot extrusion die according to the second embodiment;
FIG. 6 is a schematic diagram of a second embodiment of a top die structure of a second hot extrusion die;
FIG. 7 is a schematic diagram showing the internal structure and the cross section of a hot extrusion die according to the second embodiment;
FIG. 8 is a schematic cross-sectional view of a three-hot extrusion die of an embodiment;
wherein, 1 is the upper mould, 2 is the lower mould, 3 is the pan feeding mouth, 4 is the seam allowance, 5 is the seam allowance two, 6 is the section bar shaping mouth, 7 is the choke plug, 8 is the inclined plane, 9 is the strengthening rib, 10 is outside pitch arc, 11 is inboard arc, 12 is the tang.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1 to 3, the single-hole feeding type hot extrusion die of the embodiment comprises an upper die 1 and a lower die 2; the upper die 1 is provided with a feed inlet 3 and a welding cavity I4; the lower die 2 is provided with a welding cavity II 5 and a section bar forming port 6; the first welding cavity 4 and the second welding cavity 5 form a welding chamber together. The feed inlet 3 is communicated with the welding cavity I4; the welding cavity II 5 is communicated with a section bar forming port 6; the feed inlet 3 is crescent; the middle part of the feeding hole 3 is positioned at one side of the section B-B of the upper die, and both ends of the feeding hole are positioned at the other side of the section B-B of the upper die; the upper die section B-B refers to an upper die section where a hot extrusion processing center line is located; the position of the feeding opening 3 is staggered with the position of the section bar forming opening 6. The positioning between the upper die 1 and the lower die 2 is preferably achieved by means of a spigot 12.
The hot extrusion die is only provided with a single feeding port 3, so that the problem that welding lines appear on the profile due to a plurality of feeding ports can be solved, and the process quality of the profile is improved; the positions of the feeding hole 3 and the section bar forming hole 6 are staggered, the feeding hole 3 is crescent, and blanks formed by processing bars can quickly and uniformly reach the front of the section bar forming hole 6, so that the section bar is output under the uniform extrusion effect, and the quality of the section bar is further improved.
Example two
As shown in fig. 4 to 7, the single-hole feeding type hot extrusion die of the embodiment comprises an upper die 1 and a lower die 2; the upper die 1 is provided with a feed inlet 3 and a welding cavity I4 which are communicated with each other; the lower die 2 is provided with a welding cavity II 5 and a section bar forming port 6 which are communicated with each other; the first welding cavity 4 and the second welding cavity 5 form a welding chamber together.
The upper die 1 is preferably of a symmetrical structure with the cross section A-A of the upper die 1 as a plane of symmetry. The feed inlet 3 is one and is crescent-shaped and bent around the center line of hot extrusion processing. The middle part of the feed inlet 3 is positioned at one side of the section B-B of the upper die 1 on the upper end surface of the upper die 1, and both ends of the feed inlet 3 are positioned at the other side of the section B-B of the upper die 1. The section A-A of the upper die 1 and the section B-B of the upper die 1 are vertically intersected, and the vertical intersection is a hot extrusion processing center line.
The crescent feed inlet 3 means: the outer arc line 10 at the top of the feed inlet 3 is arranged on the circumference which takes one point on the hot extrusion processing center line as the center of a circle; the inner arc 11 at the bottom of the feed inlet 3 is arranged on a circumference two taking one point on a hot extrusion processing center line as a circle center in the area of one side of the section B-B of the upper die 1, which is close to the center of the feed inlet 3; the ratio of the diameter of the circumference one to the diameter of the processed bar is preferably: (0.85-0.95): 1. the ratio of the area of the feed inlet 3 to the cross-sectional area of the processed bar is preferably: 1: (2-4).
The feed inlet 3 gradually inclines back to the hot extrusion center line from the surface far away from the welding cavity II 5 to the surface close to the welding cavity II 5 to form an inclined surface 8. The design can enlarge the feeding area of the feeding port 3 on one hand, and can play a role in blocking on the other hand, so that the blank is extruded better.
The top wall of the welding cavity I4 is provided with a flow blocking head 7 protruding downwards; the center of the profile shaping port 6 is located on the hot extrusion processing center line, and the profile shaping port 6 is completely located in the shadow area of the choke head 7 projected to the lower die 2, so that a curve path for the movement of the processed bar is formed between the feeding port 3 and the profile shaping port 6. The ratio of the cross-sectional area of the profile shaping orifice 6 to the maximum cross-sectional area of the welding chamber is preferably: 1: (7-30)
The center of the bottom surface of the choke head 7 and the middle part of the feed inlet 3 are both positioned on the same side of the section B-B of the upper die 1. The blank is liable to reach the region of the choke head 7 remote from the feed opening 3.
The choke head 7 is provided with a reinforcing rib 9 at one side far away from the feed inlet 3; the reinforcing ribs 9 are respectively fixed with the top wall of the welding cavity I4 and the side wall of the welding cavity I4; a first space is reserved between the bottom of the reinforcing rib 9 and the bottom of the choke head 7. A second interval is reserved between the bottom of the choke head 7 and the bottom of the upper die 1. The blank enters from the crescent feed opening 3, reaches a welding area with a round cross section after passing through the periphery of the choke head 7, and is uniformly distributed before reaching the profile forming opening 6.
The welding cavity I4 gradually increases from one side close to the feed inlet 3 to one side close to the welding cavity II 5.
The utility model can avoid the phenomenon that part of blanks are not extruded or not extruded enough to generate turbulence caused by the fact that part of blanks move in a straight line from the feeding opening 3 to the section forming opening 6 without obstruction; therefore, the section bar processed by the utility model has no sandwich and no tail shrinkage. The hot extrusion die is only provided with the single feeding port 3, so that the problem that welding lines appear on the profile due to the plurality of feeding ports 3 can be avoided, and the process quality of the profile is improved. The feeding hole 3 is in a crescent shape which is bent around the hot extrusion processing center line, and the choke head is combined to bias towards the feeding hole, so that blanks formed by processing bars can be uniformly distributed before reaching the lower model material forming hole, and the profiles are output under the uniform extrusion effect, so that the quality of the profiles is further improved.
The upper die 1 and the lower die 2 of the utility model can also be mutually positioned through the seam allowance.
The hot extrusion die can be used for producing and processing solid sectional materials such as cylinders, square cylinders and the like.
Example III
The difference between the single-hole feeding type hot extrusion die and the second embodiment is that: in this embodiment, the second welding cavity of the lower die is a step cavity, as shown in fig. 8; the rest of the structure of this embodiment is the same as that of the embodiment.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (10)
1. A single hole pan feeding formula hot extrusion mould, its characterized in that: comprises an upper die and a lower die; the upper die is provided with a feed inlet and a welding cavity I; the lower die is provided with a welding cavity II and a section bar forming port; the welding cavity I and the welding cavity II form a welding chamber together; the feed inlet is communicated with the welding cavity I; the welding cavity II is communicated with the section bar forming port; the feed inlet is crescent; the middle part of the feeding hole is positioned at one side of the section B-B of the upper die, and both ends of the feeding hole are positioned at the other side of the section B-B of the upper die; the upper die section B-B is an upper die section where a hot extrusion processing center line is located; the positions of the feeding port and the section bar forming port are staggered.
2. The single-orifice feed hot extrusion die of claim 1, wherein: a top wall of the welding cavity is provided with a flow blocking head protruding downwards; the section forming opening is completely positioned in a shadow area of the choke head projected to the lower die so as to realize that the positions of the feeding opening and the section forming opening are staggered.
3. The single-hole fed hot extrusion die of claim 2, wherein: the center of the bottom surface of the choke head and the middle part of the feed inlet are both positioned on the same side of the section B-B of the upper die.
4. The single-hole fed hot extrusion die of claim 2, wherein: the choke head is provided with a reinforcing rib at one side far away from the feed inlet; the reinforcing rib is respectively fixed with a top wall of the welding cavity and a side wall of the welding cavity; and a first interval is reserved between the bottom of the reinforcing rib and the bottom of the choke head.
5. The single-hole fed hot extrusion die of claim 2, wherein: and a second interval is reserved between the bottom of the choke head and the bottom of the upper die.
6. The single-hole fed hot extrusion die of claim 2, wherein: the feeding port is gradually inclined back to the hot extrusion center line from the surface far away from the welding cavity and extending towards the second welding cavity to form an inclined surface.
7. The single-orifice feed hot extrusion die of claim 6, wherein: the upper die is of a symmetrical structure taking the section A-A of the upper die as a symmetrical plane; the upper die section A-A and the upper die section B-B are vertically intersected, and the vertical intersection is a hot extrusion processing center line;
the outer arc line at the top of the feed inlet is arranged on a circumference which takes one point on the hot extrusion processing center line as the center of a circle; the inner side arc of the bottom of the feeding hole is arranged on a circumference two which takes a point on a hot extrusion processing center line as a circle center in the area of one side of the upper die section B-B, which is close to the center of the feeding hole.
8. The single-orifice feed hot extrusion die of claim 7, wherein: the ratio of the diameter of the circumference A to the diameter of the processed bar is as follows: (0.85-0.95): 1.
9. the single-orifice, feed hot extrusion die of any one of claims 1 to 8, wherein: the ratio of the area of the feed inlet to the area of the cross section of the processed bar is as follows: 1: (2-4).
10. The single-orifice, feed hot extrusion die of any one of claims 1 to 8, wherein: the ratio of the cross section area of the section forming port to the maximum area of the cross section of the welding chamber is as follows: 1: (7-30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220634375.3U CN218963650U (en) | 2022-03-23 | 2022-03-23 | Single-hole feeding type hot extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220634375.3U CN218963650U (en) | 2022-03-23 | 2022-03-23 | Single-hole feeding type hot extrusion die |
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| Publication Number | Publication Date |
|---|---|
| CN218963650U true CN218963650U (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220634375.3U Active CN218963650U (en) | 2022-03-23 | 2022-03-23 | Single-hole feeding type hot extrusion die |
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| CN (1) | CN218963650U (en) |
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- 2022-03-23 CN CN202220634375.3U patent/CN218963650U/en active Active
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